JP6976610B2 - Electric valve - Google Patents

Electric valve Download PDF

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JP6976610B2
JP6976610B2 JP2020124314A JP2020124314A JP6976610B2 JP 6976610 B2 JP6976610 B2 JP 6976610B2 JP 2020124314 A JP2020124314 A JP 2020124314A JP 2020124314 A JP2020124314 A JP 2020124314A JP 6976610 B2 JP6976610 B2 JP 6976610B2
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valve body
valve
output gear
gear
driver
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JP2020169728A (en
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貴雄 原田
健資 田渕
竜也 吉田
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Fujikoki Corp
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Fujikoki Corp
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Priority claimed from JP2019160580A external-priority patent/JP6742041B2/en
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Priority to JP2021117074A priority patent/JP7175042B2/en
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Priority to JP2022173881A priority patent/JP7403187B2/en
Priority to JP2023204995A priority patent/JP2024012720A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Description

本発明は、例えば、空気調和機の冷媒の流量を制御する電動弁に関する。 The present invention relates to, for example, an electric valve that controls the flow rate of the refrigerant of an air conditioner.

特許文献１は、本出願人に係る電動弁の詳細な構造を開示する。
この電動弁にあっては、キャンと称する密閉構造の有底円筒部材の外周部にステータを配置し、これがキャンの内部に回転自在に支持されるロータを駆動する。このステータ及びロータはステッピングモータを構成する。 Patent Document 1 discloses the detailed structure of the electric valve according to the applicant.
In this electric valve, a stator is arranged on the outer peripheral portion of a bottomed cylindrical member having a closed structure called a can, and this drives a rotor rotatably supported inside the can. The stator and rotor form a stepping motor.

ロータの回転は遊星歯車機構を用いた減速装置の太陽ギヤに伝達され、出力ギヤに出力される。遊星歯車機構を用いることにより、太陽ギヤに対する出力ギヤの減速比は、１／５０程度の大きな減速比を得ることができ、微細な流量制御を達成することができる。この減速比は、遊星歯車機構を構成する各ギヤの歯数を適宜に選択することによって、設計上で要求される減速比を得ることができる。 The rotation of the rotor is transmitted to the sun gear of the reduction gear using the planetary gear mechanism, and is output to the output gear. By using the planetary gear mechanism, the reduction ratio of the output gear to the sun gear can be as large as 1/50, and fine flow rate control can be achieved. As for this reduction ratio, the reduction ratio required by design can be obtained by appropriately selecting the number of teeth of each gear constituting the planetary gear mechanism.

出力ギヤの回転は、ドライバと称する雄ねじ部材（特許文献１においてはねじ軸５２）に伝達される。ドライバの雄ねじ（特許文献１においては雄ねじ部５３）はキャン内部に固定されたねじ軸受（特許文献１においては筒状軸受５０）の雌ねじ部に螺合されており、ドライバは、出力ギヤの回転運動をねじ機構により直線運動に変換する。ドライバの直線運動は、軸状の弁体に伝達され、弁体と弁座の間の流路面積を変化させる。この作用によって電動弁は、冷媒の流量を精密に制御することができる。 The rotation of the output gear is transmitted to a male screw member (screw shaft 52 in Patent Document 1) called a driver. The male screw of the driver (male screw portion 53 in Patent Document 1) is screwed into the female screw portion of the screw bearing (cylindrical bearing 50 in Patent Document 1) fixed inside the can, and the driver rotates the output gear. The motion is converted into a linear motion by a screw mechanism. The driver's linear motion is transmitted to the axial valve body and changes the flow path area between the valve body and the valve seat. By this action, the electric valve can precisely control the flow rate of the refrigerant.

特開２００８−１０１７６５号公報Japanese Unexamined Patent Publication No. 2008-101765

上述した電動弁にあっては、出力ギヤは軸方向の一定位置で回転運動し、出力ギヤの下端部に設けた平ドライバ形状の凸部をドライバに設けたスリット状の凹部に挿入して出力ギヤの回転運動をドライバ側に伝達する。出力ギヤの前記凸部がドライバに設けた前記凹部内で軸方向に摺動することにより、出力ギヤが回転すれば該出力ギヤはその回転軸方向に移動しないにも関わらず、ドライバはねじ機構で軸方向に直線運動することができる。これにより出力ギヤとドライバとの間の距離は変化する。 In the above-mentioned electric valve, the output gear rotates at a fixed position in the axial direction, and a flat driver-shaped convex portion provided at the lower end of the output gear is inserted into a slit-shaped concave portion provided in the driver to output. The rotational movement of the gear is transmitted to the driver side. The convex portion of the output gear slides in the axial direction in the concave portion provided in the driver, so that if the output gear rotates, the output gear does not move in the rotation axis direction, but the driver has a screw mechanism. Can move linearly in the axial direction. This changes the distance between the output gear and the driver.

このドライバの直線運動を許容するために、前述の凸部と凹部との係合部には、ある程度の隙間が必要となる。出力ギヤは両方向に回転してドライバを介して弁体の軸線方向の位置を制御する。しかしながら、上述した隙間の存在により、出力ギヤの回転とドライバの回転には回転方向が変化する際にヒステリシスが発生する。
本発明の目的は、上述したヒステリシスを解消する電動弁を提供するものである。 In order to allow the linear motion of the driver, a certain amount of gap is required in the engaging portion between the convex portion and the concave portion described above. The output gear rotates in both directions and controls the axial position of the valve body via the driver. However, due to the existence of the above-mentioned gap, hysteresis occurs in the rotation of the output gear and the rotation of the driver when the rotation direction changes.
An object of the present invention is to provide an electric valve that eliminates the above-mentioned hysteresis.

上記目的を達成するために、本発明の電動弁は、弁室を有する弁本体と、前記弁本体に結合される円筒形状のキャンと、前記キャンの外部に装備されるステータ部材と、前記キャンの内部に装備されるロータ部材と、前記ロータ部材の回転数を減速して、前記ロータ部材に対して昇降する出力ギヤに出力する減速装置と、前記弁室に設けられた弁座に接離する方向に移動する弁体と、前記弁本体に固定され、内周面の一部に雌ねじ部が形成されているねじ軸受と、前記出力ギヤとともに回転し、前記ねじ軸受の雌ねじ部に螺合される雄ねじ部を設けたドライバと、を備え、
前記ドライバは、前記内周面のうち前記雌ねじ部が形成されていない部分で回転自在に支持された状態で前記弁座に接離する方向に昇降して前記弁体を移動させることを基本構成とするものである。
この構成により、前記出力ギヤとねじ駆動部材との間の隙間がなくなり、上記のヒステリシスが低減される。 In order to achieve the above object, the electric valve of the present invention includes a valve body having a valve chamber, a cylindrical can coupled to the valve body, a stator member mounted on the outside of the can, and the can. A rotor member installed inside the rotor member, a speed reducing device that decelerates the rotation speed of the rotor member and outputs the speed to an output gear that moves up and down with respect to the rotor member, and a valve seat provided in the valve chamber. A valve body that moves in the direction of the valve, a threaded bearing that is fixed to the valve body and has a female threaded portion formed on a part of the inner peripheral surface, and a threaded bearing that rotates with the output gear and is screwed into the female threaded portion of the threaded bearing. With a driver provided with a male threaded part,
The basic configuration of the driver is to move the valve body by moving up and down in a direction of contacting and separating from the valve seat while being rotatably supported by a portion of the inner peripheral surface where the female thread portion is not formed. Is to be.
With this configuration, the gap between the output gear and the screw drive member is eliminated, and the above-mentioned hysteresis is reduced.

上述した手段を備えることにより、電動弁の開閉時に発生する流量特性のヒステリシスを低減することができる。 By providing the above-mentioned means, it is possible to reduce the hysteresis of the flow rate characteristic generated when the electric valve is opened and closed.

本発明の一実施例の断面図（全開状態）。Sectional drawing (fully open state) of one Example of this invention. 本発明の一実施例の断面図（全閉状態）。Sectional drawing (fully closed state) of one Example of this invention.

図１及び図２は本発明の一実施例を示す電動弁の断面図であって、図１は弁が全開した状態を示し、図２は弁が全閉した状態を示す。 1 and 2 are cross-sectional views of an electric valve showing an embodiment of the present invention, FIG. 1 shows a state in which the valve is fully opened, and FIG. 2 shows a state in which the valve is fully closed.

全体を符号１で示す本発明の一実施例の電動弁は、弁本体１０を有し、弁本体１０には弁室１４と弁室１４に通ずるオリフィス１６が形成される。
弁本体１０に対しては、オリフィス１６側のパイプ１２ａと、弁室１４の側面の開口部に通ずるパイプ１２ｂが接続される。弁本体１０の弁室１４の上部にはねじ軸受２０が挿入され、カシメ手段Ｋ１により弁本体１０に固定される。
ねじ軸受２０の中心部には雌ねじ部２２が形成される。弁本体１０の上部にはベースプレート２８が固着され、これに有底円筒形状のキャン３０がとりつけられる。 The electric valve according to the embodiment of the present invention, which is indicated by reference numeral 1, has a valve body 10, and an orifice 16 leading to a valve chamber 14 and a valve chamber 14 is formed in the valve body 10.
A pipe 12a on the orifice 16 side and a pipe 12b leading to an opening on the side surface of the valve chamber 14 are connected to the valve body 10. A screw bearing 20 is inserted in the upper part of the valve chamber 14 of the valve body 10, and is fixed to the valve body 10 by the caulking means K1.
A female threaded portion 22 is formed at the center of the threaded bearing 20. A base plate 28 is fixed to the upper part of the valve body 10, and a bottomed cylindrical can 30 is attached to the base plate 28.

キャン３０の外周部には、全体を符号４０で示すステータ部材が嵌着される。ステータ部材４０は、プラスチック４２で覆われたボビン４４と、ボビン４４に巻き付けたコイル４６を有し、コイル４６はリード線４８を介して給電を受ける。このステータ部材はキャン３０の内部に回転自在に支持されるロータ部材５０とともにステッピングモータを構成する。 A stator member represented by reference numeral 40 is fitted to the outer peripheral portion of the can 30. The stator member 40 has a bobbin 44 covered with a plastic 42 and a coil 46 wound around the bobbin 44, and the coil 46 receives power via a lead wire 48. This stator member constitutes a stepping motor together with a rotor member 50 rotatably supported inside the can 30.

磁性材料でつくられたロータ部材５０は、プラスチック材料でつくられた太陽ギヤ部材５１に一体に連結され、これらはロータを構成している。太陽ギヤ部材５１の中心部にはシャフト６２が挿入される。シャフト６２の上部はキャン３０の頂部の内側に配置される支持部材６０により支持される。
キャリア５３は、後述の出力ギヤ７０の底面上に載置され、複数の遊星ギヤ５５を回転自在に支持するシャフト５４を備えている。 The rotor member 50 made of a magnetic material is integrally connected to the sun gear member 51 made of a plastic material, and these constitute a rotor. A shaft 62 is inserted into the center of the sun gear member 51. The upper part of the shaft 62 is supported by a support member 60 arranged inside the top of the can 30.
The carrier 53 is mounted on the bottom surface of an output gear 70 described later, and includes a shaft 54 that rotatably supports a plurality of planetary gears 55.

太陽ギヤ部材５１の太陽ギヤ５２は、前記シャフト５４に回転自在に支持される複数個の遊星ギヤ５５に噛み合う。遊星ギヤ５５は軸方向に長いギヤであって、その上半分はねじ軸受２０の上部に固定された円筒部材２４の上部にカシメ部Ｋ２により取付けられた環状のリングギヤ（内歯固定ギヤ）５８に噛み合っている。
遊星ギヤ５５の下半分は環状の出力ギヤ７０の内歯ギヤ７１に噛み合っている。 The sun gear 52 of the sun gear member 51 meshes with a plurality of planetary gears 55 rotatably supported by the shaft 54. The planetary gear 55 is a gear that is long in the axial direction, and the upper half thereof is attached to an annular ring gear (internal tooth fixing gear) 58 attached by a caulking portion K2 to the upper part of a cylindrical member 24 fixed to the upper part of the screw bearing 20. It is in mesh.
The lower half of the planetary gear 55 meshes with the internal tooth gear 71 of the annular output gear 70.

上述した歯車構成は、いわゆる不思議遊星歯車機構を構成し、この遊星歯車機構を用いた減速装置（遊星歯車減速装置）においては、リングギヤ５８の歯数と、出力ギヤ７０の内歯ギヤ７１の歯数をわずかに異なる歯数とすることで、太陽ギヤ５２の回転数を大きな減速比で減速して出力ギヤ７０に伝達することができる。 The above-mentioned gear configuration constitutes a so-called mysterious planetary gear mechanism, and in a speed reducing device (planetary gear speed reducing device) using this planetary gear mechanism, the number of teeth of the ring gear 58 and the teeth of the internal gear 71 of the output gear 70 By setting the number of teeth to slightly different numbers, the rotation speed of the sun gear 52 can be reduced by a large reduction ratio and transmitted to the output gear 70.

出力ギヤ７０はドライバ７２に一体に連結される。
この出力ギヤ７０は後述のように昇降可能となっており、またドライバ７２の雄ねじ部７４は、ねじ軸受２０の雌ねじ部２２に螺合されているので、出力ギヤ７０とドライバ７２はその回転ととともに軸方向に移動する。ドライバ７２の軸方向の移動量はボール状の継手７６を介して軸状の弁体８０に伝達される。弁体８０は弁本体１０の内部に固定されたパイプ状のばねケース９０により案内されて軸方向に移動する。ばねケース９０と弁体８０の間には、コイルスプリング９２が配設されており、弁体８０を常時開弁方向に付勢している。 The output gear 70 is integrally connected to the driver 72.
The output gear 70 can be raised and lowered as described later, and the male screw portion 74 of the driver 72 is screwed into the female screw portion 22 of the screw bearing 20, so that the output gear 70 and the driver 72 rotate. Moves in the axial direction with. The amount of movement of the driver 72 in the axial direction is transmitted to the axial valve body 80 via the ball-shaped joint 76. The valve body 80 is guided by a pipe-shaped spring case 90 fixed inside the valve body 10 and moves in the axial direction. A coil spring 92 is disposed between the spring case 90 and the valve body 80 to constantly urge the valve body 80 in the valve opening direction.

本発明の電動弁は以上のように、出力ギヤ７０とドライバ７２が一体となって回転及び軸方向に移動する。この構造のために従来の電動弁に存在した出力ギヤとドライバの間の継手構造を省略することができ、ヒステリシスの発生を減少させることができる。
すなわち、特許文献１に示されたような従来の電動弁では、遊星歯車機構の出力ギヤは昇降せず、その一方でドライバが昇降動作を行うために、前記出力ギヤとドライバとを分離し、かつ出力ギヤに対してドライバが昇降可能となるように、凸部及び凹部の係合による連結構造を採用していたが、本発明の一実施例では、上記のように出力ギヤ７０を昇降可能とし、かつ出力ギヤ７０とドライバ７２とを一体化するようにしたので、出力ギヤ７０とドライバ７２との間に存在していた隙間を省くことが出来、ヒステリシスの発生を減少させることができる。 As described above, in the electric valve of the present invention, the output gear 70 and the driver 72 are integrally rotated and moved in the axial direction. Due to this structure, the joint structure between the output gear and the driver, which was present in the conventional electric valve, can be omitted, and the occurrence of hysteresis can be reduced.
That is, in the conventional electric valve as shown in Patent Document 1, the output gear of the planetary gear mechanism does not move up and down, while the output gear and the driver are separated in order for the driver to move up and down. In addition, a connection structure is adopted by engaging the convex portion and the concave portion so that the driver can move up and down with respect to the output gear. However, in one embodiment of the present invention, the output gear 70 can be raised and lowered as described above. In addition, since the output gear 70 and the driver 72 are integrated, the gap existing between the output gear 70 and the driver 72 can be omitted, and the occurrence of hysteresis can be reduced.

この実施例においては、キャリア５３が出力ギヤ７０の底面上に載置されているので、該出力ギヤ７０が昇降に応じて、キャリア５３及び遊星ギヤ５５も昇降する。すなわち、出力ギヤ７０の昇降に応じて、リングギヤ５８に対する遊星ギヤ５５上部の噛み合い面がロータ部材５０の中心軸方向にずれることになる。
この場合、例えばロータ５０に設けられた太陽ギヤ５２の下端がキャリア５３上に載置されている場合には、出力ギヤ７０の昇降と共にロータ部材５０も昇降してしまい、該ロータ部材５０とステータ部材４０との間の軸方向の位置が変化し、ステッピングモータとしてのトルク低下が発生する。 In this embodiment, since the carrier 53 is placed on the bottom surface of the output gear 70, the carrier 53 and the planetary gear 55 also move up and down as the output gear 70 moves up and down. That is, as the output gear 70 moves up and down, the meshing surface of the upper part of the planetary gear 55 with respect to the ring gear 58 shifts in the direction of the central axis of the rotor member 50.
In this case, for example, when the lower end of the sun gear 52 provided on the rotor 50 is placed on the carrier 53, the rotor member 50 also moves up and down as the output gear 70 moves up and down, and the rotor member 50 and the stator move up and down. The axial position between the member 40 and the member 40 changes, and a torque drop as a stepping motor occurs.

この現象を防止するために、この実施例にあっては、固定部材であるリングギヤ５８と太陽ギヤ部材５１の間に皿ばね１００が装備されている。皿ばね１００は、固定部材であるリングギヤ５８に支持されて太陽ギヤ部材５１を常時シャフト６２の支持部材６０側に向けて押し上げ、該支持部材６０に当接させているので、出力ギヤ７０が下降してもロータ部材５０は下降することがなく、トルクの低下が生じない。 In order to prevent this phenomenon, in this embodiment, a disc spring 100 is provided between the ring gear 58 which is a fixing member and the sun gear member 51. Since the disc spring 100 is supported by the ring gear 58 which is a fixing member and constantly pushes up the sun gear member 51 toward the support member 60 side of the shaft 62 and brings it into contact with the support member 60, the output gear 70 descends. Even so, the rotor member 50 does not descend, and the torque does not decrease.

なお、上述の説明においては、出力ギヤ７０の昇降に応じて、キャリア５３、シャフト５４及び遊星ギヤ５５で構成されるユニットの全体が昇降するものとしたが、出力ギヤ７０の底面とキャリア５３との間に該キャリア５３を上方に押し上げるばね手段を設け、上記のユニットを例えば太陽ギヤ部材５１に当接させるようにすれば、出力ギヤ７０が昇降したときに該出力ギヤ７０のみを昇降させ、キャリア５３及び遊星ギヤ５５の軸方向の位置を変えないようにすることもできる。この場合は、出力ギヤ７０の昇降に伴い、遊星ギヤ５５下部に対する出力ギヤ７０の噛み合い面がロータ部材５０の中心軸方向にずれることになる。 In the above description, the entire unit including the carrier 53, the shaft 54, and the planetary gear 55 moves up and down according to the raising and lowering of the output gear 70, but the bottom surface of the output gear 70 and the carrier 53 are used. If a spring means for pushing up the carrier 53 upward is provided between the two, and the unit is brought into contact with, for example, the sun gear member 51, only the output gear 70 is moved up and down when the output gear 70 is moved up and down. It is also possible to keep the axial positions of the carrier 53 and the planetary gear 55 unchanged. In this case, as the output gear 70 moves up and down, the meshing surface of the output gear 70 with respect to the lower part of the planetary gear 55 shifts in the direction of the central axis of the rotor member 50.

図１は、弁体８０が最大位置まで上昇した全開状態を示し、弁体８０の先端のニードル部８２と弁座１８との間の弁リフトＬ１が最大の状態を示す。
図２は弁体８０のニードル部８２が弁座１８に着座した全閉状態を示す。各部材の構造と作用は図１と同様であるので、同一の符号を付して詳細な説明は省略する。 FIG. 1 shows a fully open state in which the valve body 80 is raised to the maximum position, and the valve lift L1 between the needle portion 82 at the tip of the valve body 80 and the valve seat 18 is in the maximum state.
FIG. 2 shows a fully closed state in which the needle portion 82 of the valve body 80 is seated on the valve seat 18. Since the structure and operation of each member are the same as those in FIG. 1, the same reference numerals are given and detailed description thereof will be omitted.

１０ 弁本体
１２ａ、１２ｂ パイプ
１４ 弁室
１６ オリフィス
１８ 弁座
２０ ねじ軸受
２２ 雌ねじ部
２４ 円筒部材
２８ ベースプレート
３０ キャン
４０ ステータ部材
４２ プラスチック
４４ ボビン
４６ コイル
４８ リード線
５０ ロータ部材
５１ 太陽ギヤ部材
５２ 太陽ギヤ
５３ キャリア
５４ シャフト
５５ 遊星ギヤ
５８ リングギヤ
６０ 支持部材
６２ シャフト
７０ 出力ギヤ
７１ 内歯ギヤ
７２ ドライバ
７４ 雄ねじ部
８０ 弁体
８２ ニードル部
９０ ばねケース
９２ コイルスプリング
１００ 皿ばね

10 Valve body 12a, 12b Pipe 14 Valve chamber 16 orifice 18 Valve seat 20 Threaded bearing 22 Female threaded part 24 Cylindrical member 28 Base plate 30 Can 40 Stator member 42 Plastic 44 Bobin 46 Coil 48 Lead wire 50 Rotor member 51 Sun gear member 52 Sun gear 53 Carrier 54 Shaft 55 Planetary gear 58 Ring gear 60 Support member 62 Shaft 70 Output gear 71 Internal tooth gear 72 Driver 74 Male thread part 80 Valve body 82 Needle part 90 Spring case 92 Coil spring 100 Countersunk spring

Claims (1)

弁室を有する弁本体と、前記弁本体に結合される円筒形状のキャンと、前記キャンの外部に装備されるステータ部材と、前記キャンの内部に装備されるロータ部材と、前記ロータ部材の回転数を減速して、前記ロータ部材に対して昇降する出力ギヤに出力する減速装置と、前記弁室に設けられた弁座に接離する方向に移動する弁体と、前記弁本体に固定され、内周面の一部に雌ねじ部が形成されているねじ軸受と、前記出力ギヤとともに回転し、前記ねじ軸受の雌ねじ部に螺合される雄ねじ部を設けたドライバと、を備え、
前記ドライバは、前記内周面のうち前記雌ねじ部が形成されていない部分で回転自在に支持された状態で前記弁座に接離する方向に昇降して前記弁体を移動させることを特徴とする電動弁。

A valve body having a valve chamber, a cylindrical can coupled to the valve body, a stator member mounted outside the can, a rotor member mounted inside the can, and rotation of the rotor member. A speed reducing device that decelerates the number and outputs it to an output gear that moves up and down with respect to the rotor member, a valve body that moves in a direction of contacting and separating from a valve seat provided in the valve chamber, and a valve body that is fixed to the valve body. A screw bearing having a female threaded portion formed on a part of the inner peripheral surface, and a driver provided with a male threaded portion that rotates together with the output gear and is screwed into the female threaded portion of the threaded bearing.
The driver is characterized in that the valve body is moved by moving up and down in a direction of contacting and separating from the valve seat while being rotatably supported by a portion of the inner peripheral surface where the female thread portion is not formed. Electric valve.
JP2020124314A 2019-09-03 2020-07-21 Electric valve Active JP6976610B2 (en)

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* Cited by examiner, † Cited by third party
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JP2021165590A (en) * 2020-07-21 2021-10-14 株式会社不二工機 Motor valve
JP7175042B2 (en) 2020-07-21 2022-11-18 株式会社不二工機 electric valve

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